Typewriting machine



Oct. 19 1926.

H. H. STEELE TYPEWRITING MACHINE Filed May 16. 1924 2 Sheets-Sheet 1 Oct. 19 1926. 1,603,811

H. H. STEELE TYPEWRITiNG MACHINE-2 Filed May 16, 1924 2 Sheets-Sheet 2 fzyzat $2912 $2916.

Hlllllllllllllllfl lllllllllllllllllll [lllllllllllllllfll 2 Patented Get. 19, 1926.

PTENT OFFICE.

HERBERT H. STEELE, OF BROOKLYN, NEW YORK, ASSIGNOR TO UNDERWOOD TYPE- IJRITEPJ COIJIPA'NY, OF KEV? YORK, N. Y., A CORPORATION OF DELAWARE.

TYPEVJRITING IVIACHINE.

Application filed May 16,

This invention relates to line-spacing for typewriting machines in which the normal or standard line-spacing unit may be minutely increased or diminished at Wlll for 5 a predetermined linespace unitary dimension of greater or less degree, and to provide for multiples of that predetern'lincd unit.

The principal object of the present invention is to provide an. improved. approximately universal line-spacing mechanisn'i that can be adapted by a single adjustment to different permanent spacing;- units associated with any typeface-area employed in a modern typewriting n'iaehine, and having suitable connections that automatically provide full or fractional multiples of any such dos red spacing-unit in the ratio of 1 1/2, 2 1/2 and 3 line-space diniensio 20 ianother feature of the invention is in the provision of a platen that may be turned by hand in either direction. to an unlimited extent, with a lilie-spacingmechanism connected hereto by a positive clutch element comprising toothed members that are lu'ougrht into co-operation at the initial moven'ient of the linespace lever, and interlocl': in such a manner as to promote a positive transn'iission of movement between the line pace lever and the platen, thusproviding for uniform line-space distances rerdlcss of any abuse the line-space lever may be subjected. to.

Another feature provides that a standard unit of line-spacing; may be readily changed to a unit of greater or less degree to register a predetermined spacing unit for the \FOllTSllCGt, and, when once set, any subsequent line-space movement may be made through the. manipulation of the line-space lever in the usual manner.

.other feature provides that when a standard single line-spacing unit has been iucreas or reduced. to a predetermined spacing unit on the WOll-I-Sl16Gll, this single space dimension may be increased in n'iultiples of 1. 1/2, 2, 2 1/2 and 3, through the xtment of a single part to an lsltlflZi-E'Qllbi e positively connected to the line- .:i1(ll0 or lever, and said lever IS an v f uni a stop mechanism 01 CLQI i the length of stroke of the platen. rent of this stop mechanism 1s the ti ve llnO-TCQtllIlQ motion of the 1824. Serial No. 713,641.

lug on the carriage frame against which the lever normally rests, and the cooperaelement of the stop mechanism for limiting the stroke of the lever and the platen comprises two stop devices, each of which is independently adjustable. The function of one of the adjustments is to secure minute variations in the length of the line-spacing unit. The function of the other adjustment is to determine how many of such units shall. constitute a feeding movement of the platen in a line-space direction.

Usually on typewriting machines the line spacing unit is invariable, and it is also usual for the line-space regulator to determine Whether the platen shall revolve through 1, 2 or 3 of said invariable units. In the present instance, the unit itself is niinutely variable, and provision is made of a regulating}; device which is settable to determine not only Whether the platen shall revolve to the extent of 1, 2 or 3 units at its line-feeding movement, but also gives it a capacity for revolving 1 1/2 or 2 1/2 units at such movement.

As before said, the platen lever normally rests against a fixed stop, and to cooperate therewith to measure the extent of revolutionof the platen, there is provided a minutely variable device to determine the length of the unit, and also a regulating; de vice to determine how many units shall compose a feeding movement of the platen.

The minutely variable stop in the present invention may be mounted directly upon the carriage frame, and may comprise a stop and a minute adjustment therefor. The line-space regulator may comprise a device settable to different positions along the carriage lever, and constructed to engage said minutely adjusted stop at the completion of the lever stroke. The nearer said regulator is set to the fulcrum of the lever, the longer is the stroke of the lever and the platen. The more remote said stop is set from the fulcrum of the lever, the shorter the lever stroke and the. platen stroke.

The device on the lever is illustrated preferably in the form of a shackle which is settahle to different positions on the lever, preferably by inserting a pin thereof into any selected hole in a series Which extends the length of the lever, these holes being appropriately spaced. The end of this shackle adapted to engage the minutely adjustable stop at the completion of the drive stroke of the lever. 'lhe shackle and the adjustable stop may be telescopically connected, so that the shackle may constitute some thing having the form of a plunger guided or telescoping in a sleeve and adapted to abut against the minutely adjustable stop; this telescoping device being pivotally connected by the shackle to the line-space lever, and being pivotally connected to the carriage frame, so that it has the form of an extensible link, thus conducing to simplic ity, eliectiveness and compactness, and minimizing the cost. The minute adjustment of the stop may be effected by a threaded cap upon the extensible link.

It will thus be seen that the shackle may be detached from the line-space lever and reattached thereto at any desired hole in the series, and that the extensibility of the link permits such attachment and also accommodates the variations in the length of stroke imparted to the shackle by the line-space lever. The shackle may comprise a tongue element which has the form of a plunger to fit in the sleeve of the minutely adjustable stop element. ll hile these and other parts are illustrated in one form in the drawings, still it will be understood that the invention includes reversals of parts and other variations.

ther features and advantages will hereinafter appear.

In the accompanying dawings,

Figure l is a full size elevational view of the left-hand end of a typewriting machine carriage constructed and arranged according to this invention.

Figure 2 is a plan view of the extreme left-hand end of the carriage, showing the line-spacing devices arranged in operative position.

Figure 3 is a vertical sectional view taken 011 a plane indicated by the line 3 3 in Figure 2.

Figure lis an enlarged detail view of the spring-pressed detent connecting the linespace lever to its adjustable stop.

Figure 5 is an enlarged longitudinal section illustrating parts associated with the minute adjustment of the linesspace lever stop. I

Figure 6 is a detail view, showing the long roller that co-operates with the line-space lever at the two shift positions of the car riage.

Figure 7 is a diagrammatic view, showing the transmitted movements of the p'votal points on the line-space lever.

Figures 8, 9 and 10 are enlarged sectional views illustrating the manner ofcontrolling the interlocks between the line-spacing transmission and the platen.

Figure 11. is a transverse sectional view taken on the line 1111 of FigureS.

Figures 12 and 13 illustrate a modification in construction of the means for controlling the operation of the interlocking dogs in transmitting movement of the line-space lever to the platen.

Figure 1-i is a transverse sectional view taken on the line 1ll-fl of Figure 8, looking in the direction of the arrow.

Figure 15 is an enlargeu plan view of the crown wheel. associated with the clulch elen'ients, illustrating the relative position of the three dogs that co-operate with the teeth thereof.

Figures 16, 17 and 18 are diagrannmitic views, indicating the operation of lowering the dogs from their normal or raised position, to their lower or operative position in engagement with the teeth of the crown wheel, and for purposes of illustration the dogs are shown in these three ligures diametrically .pposite each other.

Referring in detail to the drawings, the usual Underwood cylindrical platen 20 is mounted upon a shaft 21 journalod in a platen frame carried by a traveling carriage frame 225, and is shi'ltable up and down to agree with the upper and lower case faces of type on type-bars 2%. The platen is also providedv with feed-rolls 25 adapted to feed the work-sheet around the platen from the rear in the well-known Underwood manner.

The platen 20 is line-spaced to feed the work-sheet by a novel mechanism including a line-space lever 26 pivoted to a shoulder screw 27 usually threaded into a lug on the carriage frame 223, the line-space lever swing ing between lugs 28 and 29 forming part of the frame 23, the lever normally resting against the lug 28 which serves as the initiating gage for the length of the lever stroke.

llhe lever 26 is provided with a crank-arm 30, adjustably secured to it for facilitating assembly and having at one end an open slot to engage with a roller 31 pivoted between flanges 32 formed at the forward end of a driver in the form of a slide 33 arranged for reciprocation, the length of the roller 31 being sutlicient to engage with the arm 30 in both upper and lower shift positions, it being understood that when the platen and platen frame shift to upper case position the slide shifts up therewith, inasmuch as said slide is mounted on the platen frame while the crank-arm 30 remains stationary on the carriage frame.

The slide 33 is guided by slots through which pass shoulder screws 3i fixed in the frame, and the slide at its rear upper edge is flanged as at 36 and formed with rackteeth 37 to drive a pinion 38. The connections between the pinion 38 and the platen 20 which cause the platen to advance when the lever 26 is moved to the right of Figure '2, include a spiral pinion and a spiral gear,

the advance of: the platen being in propor tion to the extent of lever movement, but the platen remains idle during return movement of the lever.

The extent to which the line-space lever 26 may be moved. in a line-spacing direction is controlled by two separate factors that operate independently and in unison, one factor operating to vary minutely the extent of the line-spacing unit, and the other factor operating to multiply that unit. The unit varying elements may comprise a teleseopie link or shackle including in one form a plunger or rod 40 sliding freely within a sleeve 4L1 supported on a pivot 4-2 carried by a bracket 13 on the front rail of the carriage frame 23. One end of the sleeve 41 is internally threaded as at 1st to receive a threaded stud 15 riveted to the inside of a thimble or cap a0 movable freely on the sleeve 41.

In Figures 1, 2 and 4; the nmneral 4!? indicates a detent pin mounted at the free end of the plunger rod 1O and provided with a button l8to retract the pin, and a spring ll) to restore it. To co-operate with this pin 4:? the line-space lever 26 is provided. with detent openings 50, and by entering the pin 4:? into any one of these openings the pin becomes a pivot for the plunger rod l0, and the extent of movement of the line-space lever 26 is limited by the abutment of the end of the plunger 40 with a corresponding end of the stud 15; hence by arrangingthe openings 50 at predetermined radial distances from the pivoted axis 27 of the line space lever, various ratios of line-space distances may be provided for with a iii-zed stop position for the line-space lever. This feature is illustrated diagrammatically in l ure 7, in which the numeral 51 indicates a stop position when the plunger 40 strikes the stud 45, and the line X indicates the distance from the point 51 to the center of the pin 47 hence the stop position of the pin 17 at the end of any stroke of the line-space lever will intercept the radial line Y, and the relation of X to Y will always be the same for any setting of the screw stud 45.

By moving the stop position 51 forward from a vfixed Zero position on the sleeve 41, the line Y will be advanced towards the line-spacing movement to check the stroke of the line-space lover, or said line Y will be drawn to the right of Figure 2 and increase the effective stroke of the line-space lever.

The adjustment of the stop stud de termines the length of the line-spacing unit, and to produce means for indexing this n'iovement the sleeve 41 may be provided with a scale 52, each line thereof indicating a full revolution of the thimble 40 which may be graduated as at If the threaded elements 4: 1 and 15 have a screw pitch of forty threads to the inch, and the thimble 46 is graduated by twenty-live equally spaced lines, it will be possible to set'the position of the point 51 to multiples of .001 of an inch.

For the purpose of illustrating this in vention, a standard cylindrical platen is employed with a standard single line-space dimension of .107 of an inch, but it will he understood that other dimensions and ratios may be used with equal success. The zero setting of thethimble 4 6, see Figure 2, indicates a line-spacing unit of .16? of an inch when the index pin a? is set within the hole a of the line-space lever, shown at Figure 7. If said thimble 4G is turned forward upon the sleeve 1 to an index reading of .009 the line Y will be advanced .009 inches, and the effective length of the line-spacing unit will be reduced to the difference between .167 and .009 which ives .158 for a single line-spacing unit.

Similarly, if the thimble 4:0 is turned in the opposite direction the line Y will withdraw a distance of .009, and the effective length of the line-spacing unit will be lengthened .16? inches, and this dimension will be conveyed to the roller 31 and the slide 83.

As already set forth the line Y indicates the stop position for the holes in the line space lever and the predetermined multiples of line-spacing units made for the purpose of illustration of 1-1/2, 2, 21/2 and 3. These multiples of .167 for a single space unit may be indicated for the position of the roller 31 to transfer these ratios, and these roller positions transit'erred to the linespace lever 20 on the opposite sire of: the pivot 27, while the values of the radial lines that intercept the holes a, Z), 0, (Z and 0 have the same values as the multiples of movement for the roller 31, and hence when the line-space lever 26 is moved to the right of: Figure 2 to the broken line position marked 2, the index pin having been previously set within the opening 0 in the line-space lever, the plunger 40 will move from the dotted-line position in Figure 5 to the fullline position of the same figure, and the transmitted movement of the roller 31, will convey a double line-space movement to the surface travel of the platen of inches.

In a like manner, by raising and resetting the pin l? in any one of the openings (4, b, 0, (Z or e, predetermined multiples of any predetermined line-spacing units will be automatically provided for by this simple operation of changing: the index position relative to the line-space lever.

As shown at Fl e 8, the pinion 38 has a pivot on one side, and ndle on lllQ other mounted in in eta and 01 secured to the'carriagernd. The underside of the pinion has a. shouldered portion to which is firmly secured a disk 62 arranged to drive a second disk 03 mounted directly below it, loosely upon the spindle 5-8 by means of conical projections (Bl on the underside of the disk (32 adapted to align and nest within depressions in the upper :lace of the disk (53. in place of the projections (35), pins G-l may be substituted, as shown in l "'*ircs l?) and 14 to perform a similar function. These clutch controlling disks (32 and (E3 are arranged for a limited relative movement in a manner and for a purpose hereiuatter more fully explained.

A ll atin ring (it? having a concave underside presents its llat upper surface to bear against the underside oil" the disc 63 and its angular underside (37 to rest upon the beveled tacos (18 of the three dogs (39. Thee dogs (39 are arranged for a sliding movement within a Cylllflll'ltltl carrier lixed to the spindle 58, and are held in the carrier by a circularly shaped flat spring 71, set into an annular groove in the carrier and bearing against the upper edges of the dogs 69 in such a manner as to hold them in any position by frictional engagement of the spring. The dogs 69 are equally spaced from each other around the carrier Y0. and the lower ends oi? each dog are 1novided with a plurality oi? line ratchet-shaped teeth.

Directly unoer the carrier 70 and separated by a slight clearance space is a clutch or toothed crown wheel 72, freely rotatable upon the spindle 5S and having line teeth similar to the teeth 01" the dogs 69, but arranged in opposed relation, so that the teeth of the dogs, when brought to interlock with the teeth oi the clutch, become driving elements to rotate the clutch in unison with the dogs in one direction only.

The clutch 72 has a tongue across its lower end to interlock with a groove or slot Tl. cut across the adjacent end of a spiral toothed pinion 75 to drive the same so that both may rotate in unison freely about the spindle 58; the clutch is re rented from rising relatively to the pinion by a pin set transv iely in the spini'lle, the ends of the pin scaling in a central recess 56 in the upper end of the clutch 72. The pinion 75 is in operative toothed driving relation with a comiganion spiral toothed gear secured to the platen shaft 21.

From this description. up to this point, it' n'iay be seen that the platen may be rotated in either direction, by the finger-wheels 77 and during' such rotation the gear 76 will drive the pinion to rot about its axis 58, and that ny end thrust of the pinion 75 will be resisted by the pin 55 and the bracket (31; that inoveinen t of the line-space lever to the right hand will cause the sliding 'acl: 3'? to rotate the pinion 38, the two disks (32, G3, the ring 66 and the dog-carrier 70 freely in unison but that no cooperative movement takes place between these two separate devices because the dogs 69 are not in operative interlock with the clutch 72.

To ell'ect co-operation of the dogs (39 and the clutch 72 the disk (33, which is free to turn on the spindle 58 except for the interlock of the elements (34: and (35, is provided with a brake or drag to check the tree IOLiltion thereot', consisting of the extension 78 ot' the bracket (51 which is concavely curved at its edge to serve as a shoe bearing under tension against the edge of the disk (33.

The provision of a drag to resist a tree turning of the disk (33 causes the conical projection 64-, or the rounded edge of the pin til in the disk (32 to ride up the inclined face of the depression (35 in the disk (33, pressing the latter downwardly, and in turn carrying the ring (36 with it.

The ring 16, resting upon the bevelled upper ends of all three dogs (39, causes these dogs to move downwardly with the ring until further movement of individual dogs is checked by their coming into contact with the teeth ot the clutch at varying positions and, as already set forth, the dogs are equal: spacer about a circle, as shown diagran'nnatically at Figure 15, and the number 01" teeth on the clutch 72 being an even number, the three dogs ditiercntiate from the teeth oi the wheel 72 as 1/3, 2/3 and 3/3 of the pitch of a single tooth, so that when one dog is in full tooth engagement with one tooth ot the clutch the other two dogs have no operative engagement, and when two dogs have a partial tooth engagement the third dog inoperative as a driving factor.

This movement of the dogs (35) is shown diagrammatically at Figures 16, 17 and 1S, and one dog is seen to have a. full toothed engagen'ient at Figure 13. Figure 16 Shows the normal inoperative position; Figure 17 the position where the downward movement of the ring (36 brings the left-hand dog into engagement with the angular taco of the adjacent toot-l '52, while the right-hand dog has a further downward movement fully engaging with the tooth T2".

The full downward movement is shown at Figizr 18 where both dogs bottom against the eeth of the clutch 72, and as sume eii'l ercnt planes relative to the face ot the floating ring 66; hence continued pressure against said ring will force it to move transversely across the plane of the dogs and assume a position where it will engage with all three dogs and become an equalizing wedge-like element between the disk (33 and the upper ends of the dogs.

his PIOVQIHODl) of shifting the dogs (35) into operative relation with the clutch 72 takes place at the initial movement of the line-space lever, and is etiected betore the part til can be wholly withdrawn from the depression 6:"); hence when the interlock ot the dogs 69 with the clutch 72 checks the further downward movement of the disk (33, said disk is forced to rotate with the disk 62 and thus transmit continued rotation of the pinion 38 to the spiral pinion and gear 76, to rotate the platen in a linespacc direction.

On the initial return stroke of the linespare lever the disk (52 will move to the position shown at l in'ure 9, which releases the pressure on the dogs, and to prevent the projection (it from ridingup the opposite side of the depression 65 a pin 79 projects from the disk (32 to enter a hole 80 in the disk (33, and by reason of such engagement the pin will rotate the disk 63 in a direction reverse to the arrow in Figure 1d and maint ins an inoperative position of the projection (ll relative to the depression 65.

When pressure removed from the dogs the initial return movement of the linespace lever and the dog carrier rotates in a direction reverse to the arrow of Figure 13, the angular faces of the teeth in the clutch 72 become can'nning elements to push the dogs upwardly within the carrier until the teeth of the dogs are clear of the clutch teeth, the spring 71 frictionally holding all three dogs in this raised or inoperative position until the next line-spacing opera tion.

it will be noted that the platen has no detenting elements, common with most toothed line-spacing elements, it being assiuned that the present invention, with the various paper-holding devices associated with the platen, will promote sutlicient drag to prevent any accidental rotation of the platen from a fixed setting detern'rined by the linespacin;; elements herein set forth. Should these elements, bearing against the platen surface, prove inadequate to properly hold the platen stationary between linespacinn' operations, a braking connection equivalent to the resistance of the usual de tent roller may be employed to hold the platen; one of such means comprises an extension 81 of the bracket 59 adapted to enwith the edge of the metal platen head 82 and provided with an adjusting screw 83 threaded into the carriage ends to determine the degree of pressure of the r e against. the platen head.

will be noted as a conspicuous factor, the absence of springs in the construction of this line-spacing mechanism. The circur t'at spring 71 operates, not to restore the s, but to exert a frictional contact to .1 intain them at one of two positions and cannot easily become ineffective.

no restore the line-space lever and its connections to the spindle 58, a single, comparatively strongspiral spring Set is connected between a stud 85 on the slide and a stud 86 on the earriageend.

Variations may be resorted to within the scope of the invention, and portions of the improvements may be used without others.

Having thus described my invention, I

claim:

1. in a typewritmg machme, the combn nation with a carriage having a frame, and

a platen-carrying shaft revoluble therein, of a line-space lever for actuating said shaft, a sleeve supported by said frame to pivot in a horizontal plane. a rod slid-able in said sleeve, means adjustable on said sleeve to limit the inward movement of said rod, and

means on the outer end of said rod engageable with said lever.

F2. In a typewriting machine, the combination with a carriage having a frame, and

a platen-carrying shaft revoluble therein, of a hne-space lever for actuating said shaft,

said lever having openings located at diffcrent distances from its pivotal axis, a sleeve pivotally supported by said frame to oscillate in a horizontal plane, a rod slidable in said sleeve, a thimble adjustable on said sleeve, an abutment carried by said thimble to intercept the inner end of said rod, and means on the outer end of said vrod engageable in any of the mentioned openings in said lever.

In a typewriting machine, the combination with a carriage having a frame, and a platen-carrying shaft revoluble therein, of a line-space lever for actuating saidshaft, said lever having openings located at different distances from its pivotal axis, a sleeve pivotally supported by said frame to oscillate in a horizontal plane, a rod slidable in said sleeve, means on said sleeveto define the entry distance of said rod Within the sleeve, and a spring-actuated detent pin carried at the outer end of said rod'selectively engageable in any of the openings in said lever.

4. in a typewritinp; machine, the combination with a carriage having a frame, and a platen-carrying shaft revoluble therein, of a line-space lever for actuating said shaft, a micrometer pivoted on said frame, a bar slidable in the sleeve of said micrometer, its inner end abutting; the screw of the micrometer and limiting the movement of said bar, a spring-pressed detent carried. on the outer end of said bar, and an arcuate row of detent-receiving openings in said lever, each opening being a predetermined radial distance from the pivotal axis of the lever.

5. in a typewritinp; machine, the combiation with a carriage having a frame, and a platen-cswrying shaft revolulole therein, of a line-space lever for actuating; said shaft, said lever having; a plurality of openings, each opening being located at a definite radial distance from the pivotal axis of the lever, and means interchangeably engageable in any of the openings to define the action of said lever when moved in platen-operating direction, said means being adjustable to a thousandth part of an inch.

6.111 a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-space lever, of a spiral gear fixed on said shaft, a spiral pinion meshing with said gear, said pinion normally driving the gear and being susceptible of being driven by it, a linger-wheel rigid on said shaft for manually rotating the platen in either direction,

and means actuated by said lever, including said pinion and gear, to rotate the platen, in line-spacing direction only, a finely adjustable degree.

7. In a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-space lever, of a spiral gear fixed on said shaft, a spiral pinion meshing with said gear and normally driving the same, a finger-wheel fixed on said shaft to turn the platen in either direction irrespective of said gear and pinion, and means intermediate said lever and pinion operative to rotate the pinion in a direction to advance the platen in line-spacing direction through an arc of predetermined degree.

8. In a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a linespace lever, of a slide movable rectilinearly across said frame at one end thereof,

said slide having a rack incorporated tl1ere with, a roller pivoted at the front of said slide, a plate adjustably mounted on said lever, said plate having a fork operatively engaging said roller to actuate the slide, means for accurately determining the distance through which said lever can be moved, a spur pinion meshing with said rack, a spindle formed on said pinion, a spiral pinion revoluble on said spindle. a spiral gear fixed on said shaft and meshing with the spiral pinion, and intervening means on said spindle to transmit rotary motion from said spur pinion to the spiral pinion to advance the platen in line-space direction, the lastnamed means becoming disengaged upon reverse motion of said spur pinion.

9. In a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-space lever, of a finely-adjustable stop determining the angular movement that can be imparted to said lever, a slide movable rectilinearly across said frame at one end thereof, a rack incorporated with said slide, anadjustable connection between said lever and said slide, a bracket fixed on the carriage end frame, a spindle revoluble in the bracket, a spur pinion rigid on said spindle, said pinion meshing with said rack, a spiral pin ion rotatable on said spindle, a positive clutch operating auton'iatically on said spindle to lock said spur pinion, when driven in ne direction, to said spiral pinion and to release the spiral pinion upon reversal of motion, and a spiral gear fixed on said shaft to mesh With the spiral pinion, whereby said platen is rotated through a predetermined are in line-space direction at each full movement of said lever against its stop.

10. In a typewriting machine, the combifation with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-space lever, of a finely-adjustable stop determining the angular movement that can be imparted to said lever. a slide movable rectilinearly across said frame at one end thereof, a rack incorporated with said slide, an adjustable connection between said lever and said slide, a bracket fixed on the carriage end frame, a spindle revoluble in the bracket, a spur pinion rigid on said spindle, said pinion meshing with said rack, a spiral pinion rotatable on said spindle, a clutch rotatable on said spindle and keyed to said spiral pinion, said clutch having ratchetshaped teeth on its upper surface, a carrier fired on the spindle adjacently above said clutch and having open longitudinal recesses in its periphery, dogs slidable in the mentioned recesses, said dogs having teeth at their lower ends to engage the teeth of said clutch, resilient confining means for said dogs, means for pressing said dogs into ongagement with the clutch teeth, the last named means becoming operative coincidentally with initial movement of said spur pinion to in'ipart rotation to said spiral pinion in one direction, and a spiral ,a'car fixed on said platen shaft and in mesh with the spiral pinion.

11. In a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-since lever, of a linely-adjustable stop determining the angular movement that can be imparted to said lever. a slide movable rcctilinearly across said frame at one end thereof, a rack incorporated with said slide, an adjustable connection between said lever and said slide, a bracket fixed on the carriage end frame, a spindle revoluble in the bracket, spur pinion rigiil on said spindle, said pinion n'ieshing with said rack, a spiral pinion rotatable on said spindle, a clutch rotatable on said spindle and in engagen'ient with said spiral pinion, said clutch having a central recess in its upper face and radially disposed ratchet-shaped teeth" therealmut, a carrier fixed on the spindle adjacent the clutch, said carrier having longitudinal recesses in its periphery and an annular groove, dogs slidahle in the n'ientioned recesses, said dogs having teeth or. enable with the teeth of said clutch at their lower ends and being beveled at their upper ends,

a sprint;- rin set in the mentioned groove to make 'trictlonal contact with and dogs, a

floating ring having a concave under surita-ce resting on said dogs, means for exerting pressure on said ring at the inception of retation of s: id spur pinion in an advance direction, and a spiral gel 1 driven by s-id spiral pinion, said gear being; lived on the platen shaft.

12. I: a t )e\vritinomachine, the combination with a carriage having a "frame, a platen- :arrying shatt revoluble therein, and a line-space lever, ot' a bracket lined on the end of said 't' 'ame, a i-zpinille revolnbe in said bracket, a spur pinion fast on s I spindle, a slidable rack engaging; said pinion, sa d rack being actnatetjl by said lover, a spiral rear fixed on said platen shaft, a spiral pinion revoluble on said spindle and meshing with said gear, a clutch fixed to sail spial pinion, said clutch having ratchetshaped teethon its upper surtace, a *a-rrier fixed on. saic spindle and having spaced longitudinal recesses in its peripherv, dents: slidable in the mentioned recesses, sa'd do" inn teeth en ageable with the teeth chitch and beveled at their opposite floating;- ring); having a concave lower resting on the beveled ends of sair disk having a detent recess and seated on said ring, a second dist: l'lFCCKl on the lower side of v'aid spur pinion to rest on the tirstnamed disk, a detent carried by Said second disk engaging the recess in the first-named disk, aid driving means lizvd in the npger disk to loosely engage thelower d sk, whereby relative movement of the disks is per-- mitted.

13. In av typewritinp; machine, the combination with a, carriage having); a frame, a platen-carrying shaft revolnhle therein, and a line-space lever, oi a l iracket fixed on the end of said frame, a spindle revolnble in said bracket, a spur pinion fast on said spindle, a slidable 'acl: engaging said pinion, .aid rack being actuated by said lever, a spiral gear fixed on said platen shaft, spiral pinion revolnble on said spindle and meshing with said near, a clutch fixed to said. spiral pinion, said cl YEt'Cll having an even number of radial rafl hetshaped teeth on its upper snritaee, a carr er fixed on said spindle having" three uni lorinly-spaced recesses lengthwise in its periphe "y, dogs slidable in 'tl recesses, said dogs havinsif teeth on their lower ends to engage the teeth of said clutch, and being; beveled at their upper ,nds, a springhand associated with said carrier to n'iaintain said does in any position they may assume. a floating ringr having a concave lower face seated on the beveled ends of said does, 311E means for applying pressure on said ring eoineidentallv upon the comi'uenceinent o't rotatiei of said spur pinion in one direction, whereby one of said.

space lever, oi line-spacing mechanism including a pair of spiral gears actuated by th: lever and c HDCtCLl to the platen to per-ate the same, and adjustable means for regulating the number of line-s iaces to which the platen can be moved at ach actuation 0t sai l lever.

15. In a type vritinp; machine, the combination with. a revoluble 'ilaten and a line space to er, of a platei'i-driving rack, a gearactnated nechan'sm operated by said rack to the platen, at d including an automatic clutch operal'ile in one direction and inoperative in a reverse just able coimeetions beween rack.

16. In a typew :iting machine, the coinbination with a volatile platen and a line space lever, of platenalriving rack moved reciprocatively l said lever, a pinion meshing with said rink, a spindle driven thereby, z. ratchet-toothed a spiral pinion said lever and clntcn, iied therewith, said clutch and pinion being? revolnble on said spindle, a spiral tir-zed on the p aten shatt, and slidable won by said spindle to engage said .h when said lever is moved in one dion and to release the clutch upon the r, 11 ot said lever to normal position.

.-7. In a ty iewrit-ingr machine, the combination with a revoluble platen, of a spiral gear fixed on the platen, a spiral pinion n'ieshing with said gear, a line'space lever, means enabling said lever to drive aid pinion and gear to line-space the platen, and microii'ieter-controlled means tor adjusting the movement of said lever to effect minute variations in the line-space movement ol? the platen.

18, in a typewriting; macl'iine, the conibination with a revoluble platen, ot a spiral .Qear fixed on the platen, a spiral pinion meshing with said gear, a line-space lever, means enaolmg said lever to drive said pinion and gear to line-space the plate:, inimieroinezei-controlled means the reciprocative movement of said lever direction, and adto effect line variations of the line-spaoing unit of movement of the platen, and independent means for multiplying such movement by l, 2, 3 or a mixed number intermediate.

20. In a typewriting machine, the combination with a revoluble platen, of a spiral gear fixed on the platen, a spiral pinion meshing with said gear, a line-space lever, means enabling said lever to drive said pinion and gear to line-space the platen, micrometer-stop mechanism for arresting said lever to dctermine the extent oil the linespacing arc length moven'ient of the platen, and independently adjustable means for multiplying the line-spacing movement twice, thrice or tractionally at will.

2i. In a typewriting machine, the combination with a revolnble platen having a shatt, of a spiral gear fixed to the shaft, a spiral pinion meshing therewith,. a dogand-ratchet device for rotating the pinion, a carrier "for the dogs in said device, a pinion to drive said carrier, a rack meshing with said pinion, a line-space lever connect:- ed to said rack, a stop having a micrometer zuljustment and being pivotally supported on the frame of the machine, and means for pivotally engaging said stop to the lever at var'ible points to allord single, double or triple line-spacing of the platen and also to afford line-spacing movements of mechanically-determined intermediate extent.

532. In a typewriting machine, the combination with a revoluble platen having a shaft, of a spiral gear lived to the shaft, a spiral pinion meshing therewith, a dog-andratchet device or rotating the spiral pinion, a iarrier for the dogs in said device to drive said pinion, a spur pinion driving said carrier, a rack meshing with said spur pinion. a line-space lever connected to said 'ack, a multiplying regulator for said lever, and a micrometer stop combined therewith whereby fine fractional line-spacing eti'ccts may b produced by said platen.

23. In a typewriting machine, the combination with a rcvoluble platen having a shaft, of a spiral gear tired to the shaft, a spiral pinion meshing therewith, said gear and pinion operating to retard but not prevent the rotation of the platen, a line-space lever, mechanism actuated by said lever for rotating said pinion, and means for adjusting the range of action tor producing finely ariable line-spacing on said platen.

E l. In a typewriting machine, the combi nation with a .revoluble platen-carrying shaft, of line-spacing mechanism for the platen comprising a spiral gear fixed on the shaft, a spiral pinion in mesh therewith, a line-space lever, and a rack-and-pinion de vice actuated by said lever to rotate the spiral gear when the lever is moved in one direction, said device becoming disengaged by movement of the lever in an opposite direction permitting a sweeping rotation oi the platen.

25. In a typewriting machine, the combination with a revoluble platen-carrying shaft, of line-spacing ll'lCCllZUllSll'l tor the platen comprising a spiral gear fixed on the shaft, a finger-wheel on said shaft, alinespace lever, a spiral pinion meshing with sait gear, said pinion being normally free to rotate in either direction, and intervening mechanism actuated by said lever for engaging and rotating said pinion a. predeterminable amount, such engagen'ient taking place at the initial movement of said lever.

26. In a typewriting machine, the combination with a carriage having a trame, a platen carrying shaft .revoluble therein, and a line-space lever, of a telescoping link comprised of two members, one of said menr bers being pivoted to said lever and the their to said frame, and a minutely-adjustable stop associated with the frame carried ink member limiting the distance the lever carried member can be entered therein.

27. In a typewriting machine, the combination with a carriage having a frame, a platen-carrying shaft revoluble therein, and a line-space lever, of a telescoping link comprised of two members, one of said members being pivoted to said frame, a pivot on the other link member adjustably engaging said lover, a positive stop carried by one of said link mcn'ibers arresting the closing movement of the link, and means for finely ad justing said stop.

28. In a typewriting machine, the combination with a carriage having a frame, a platcncarrying shatt revoluble therein, and a liue-space lever, said lever having a plurality ot' opening," arranged at ditl'crent radial distances from its pivot, of a telescoping link comprised of two members, one of said members being pivoted on said frame, a pivot carried by the other member engageable in any of the mentioned openings in the lever, a stop carried by one of said members to arrest the relative sliding movement of said members toward each other, and means tor minutely varying the positions of said stop. I

29. In a typewriting machine, the combination with a carriagc-fran'ie, a platen-shaft carrying frame vertically shitiablc therein, and a line-space lover, of a rack slidable across the platen-shalt frame, a relatively long roller pivotally mounted on said rack to engage said lever irrespective of the relative positions of said frames, and mechanism actuated by said rack to turn the platen through an arc in exact proportion to the angular movement of said lever.

30. In a typewriting machine, the combination with a carriago-frame, a platen-shattcarrying frame vertically shittablc therein,

and a line-space lever on the carriage-frame,

of a rack mounted upon and slid-able across the platen-shaft frame, means connecting said lever to the rack, said means permit ing the rack to be shifted with the carriageframe and independentlyof said lever, and mechanism actuated by said rack to turn the platen in line-spacing direction through an are determined by said lever.

31. In a typewriting machine, the combination with a carriageframe, a platen-shaftcarrying frame vertically shiftable therein, and a line-space lever, of a rack slidable across the platen-shaft frame, a relatively long roller pivotally mounted on said rack, an arm extending laterally from said lever, said arm having a fork engaging the roller and permitting raising and lowering of the shift-frame, and mechanism actuated by said rack to turn the platen in strict accordance with the angular movement imparted to said lever when moved in line-spacing direction.

32. In a typewriting machine, the combination with a carriage having a frame, a shift-frame therein, a platen having a shaftrevoluble in the shift-frame, and a line-space lever, of mechanism actuated by said lever for turning the platen in line-space direction, comprising a spiral gear fixed on said shaft, a spiral pinion meshing therewith, a normally-open one-way clutch engaging said pinion, a rack-and-pinion device directly operated by the lever to rotate the clutch when open, and means consequent upon initial actuation of said lever in line-spacing direction to close said clutch and impart proportional movement to the platen.

33in a. typewriting machine, the combi nation with a carriage having a frame, a shift-frame therein, a platen having a shaft revoluble in the shift-frame, and a linespace lever, of mechanism actuated by said lever for turning the platen in line-space direction, comprising a spiral gear fixed on the platen-shaft, a spiral pinion meshing with the gear, a one-way clutch member engaging said pinion, all of the foregoing elements including the platen being free to rotate in either direction, mating clutch members normally out of engagement with the first-named member, a rack having a slipioint connection with said lever, a pinion driven by the rack to rotate the mating clutch members, and means becoming operative upon initial rotative movement of the lastnamed pinion to cause engagement of said clutch members.

34. In a typewriting machine, the combination with a carriage having a frame, a shift-frame therein, a platen having a shaft revoluble in the shift-frame, and a line-space lever, of mechanism actuated by said lever for turning the platen in line-space direction, comprising a s iral gear fixed on the platen-shaft, a spira pinion meshing with the gear, a one-way clutch member engaging said slidable members being beveled at their opposite ends, a concave ring floatingly engaging the beveled ends, a rack-and-pinion drive for said slidable clutch members actuated by the line-space lever, and means for applying pressure to said ring causing clutch tooth engagement, coincidentally operative upon actuating said lever in linespacing direction, the reverse movement of the lever operating to free the slidable members of the clutch.

35. In a typewriting machine, the combination with a carriage having aframe, a shift-frame therein, a platen having a shaft revoluble in the shift-frame, and a linespace lever, of mechanism actuated by said lever for turning the platen in line-space direction, comprising a spiral gear fixed on the platen-shaft, a spiral pinion meshing with the gear, a oneway clutch member engaging said pinion, said clutch member having an even number of uniformly-spaced, radiallydisposed, ratchet-shaped teeth, an odd number of slidably mounted clutch members ar ranged uniformly in a circle adjacent the first clutch member and having complementary teeth, whereby only one of the slidable members can fully engage the first member at one time, a rack-and-pinion drive for ro tating the slidable members about the 0f the first-named clutch member, said drive being directly actuated by the linespace lever, and means coincidentally operative upon actuation of the lever for pressing said slidable member uniformly against the first-named clutch member whereby one of the slidable members will effect driving engagement therewith.

36. In a typewriting machine, the combination with a carriage having a frame, a shift-frame therein, a platen having a shaft revoluble in the shift-frame, and a linespace lever, of mechanism actuated by said lever for turning the platen in line-space direction, comprising a spiral gear fixed on said shaft, a spiral pinion meshing therewith, a normally-open one-way clutch having an essentially fixed member engaging said pinion, and slidable members movable relatively thereto, a rack-and-pinion device directly connected to said line-space lever and llH arranged to rotate the slidable'members of the clutch on the axis of the fixed member, adisk fixed on the pinion of the rack-andpinion device, said disk having a projection, a second disk having a depression receptive of said projection, and means connecting between said disks permitting a slight relative rotary movement to effect engagement or disengagement of the projection in the depression said projection when disengaged operating to press said slidabie members into operative relation with the fixed member of the clutch; and when disengaged to permit the slidable members to become inoperative.

HERBERT H. STEELE 

